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Author: John Hrastar Publisher: ISBN: Category : Algorithms Languages : en Pages : 36
Book Description
A strapdown inertial reference system and an onboard digital computer can be used to change the attitude of a spacecraft over large angles in an arbitrary direction. A study was conducted with an advanced Orbiting Astronomical Observatory (OAO) using a three-axis control law previously proven globally stable. The control system can reorient the spacecraft to an arbitrary inertial attitude with a single command by operating the three momentum wheels simultaneously. Reorientation, therefore, becomes a simple extension of a hold or pointing mode. The time required for reorientation with this system is considerably shorter than the time required for a series of single-axis slews. The spacecraft attitude and control law are continuously updated by the onboard computer's using information provided by the strapdown inertial reference system. The use of a computer and inertial reference system with characteristics of systems presently under development demonstrates the feasibility of orientation with such a reference system. The basic system is not limited to the OAO but may be adapted for other three-axis-stabilized spacecraft.
Author: John Hrastar Publisher: ISBN: Category : Algorithms Languages : en Pages : 36
Book Description
A strapdown inertial reference system and an onboard digital computer can be used to change the attitude of a spacecraft over large angles in an arbitrary direction. A study was conducted with an advanced Orbiting Astronomical Observatory (OAO) using a three-axis control law previously proven globally stable. The control system can reorient the spacecraft to an arbitrary inertial attitude with a single command by operating the three momentum wheels simultaneously. Reorientation, therefore, becomes a simple extension of a hold or pointing mode. The time required for reorientation with this system is considerably shorter than the time required for a series of single-axis slews. The spacecraft attitude and control law are continuously updated by the onboard computer's using information provided by the strapdown inertial reference system. The use of a computer and inertial reference system with characteristics of systems presently under development demonstrates the feasibility of orientation with such a reference system. The basic system is not limited to the OAO but may be adapted for other three-axis-stabilized spacecraft.
Author: Publisher: ISBN: Category : Aeronautics Languages : en Pages : 1282
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author: P. Th. L. M. Van Woerkom Publisher: Elsevier ISBN: 148315257X Category : Technology & Engineering Languages : en Pages : 603
Book Description
Automatic Control in Space 1982 covers the proceedings of the Ninth IFAC/ESA Symposium. Comprised of 62 chapters, this book covers issues relevant in aerospace, such as engineering, hardware, operations, and theories. This book discusses several topics that concern space explorations, such as L-SAT attitude and orbit control system; methods of dynamic flight control; methods of satellite attitude control using a bias-momentum; and ion sensor signal fluctuations. This text will be of great interest to engineers, researchers, and professionals whose work is in line with aerospace.
Author: Yongchun Xie Publisher: Springer Nature ISBN: 9813364483 Category : Technology & Engineering Languages : en Pages : 422
Book Description
This book presents up-to-date concepts and design methods relating to space dynamics and control, including spacecraft attitude control, orbit control, and guidance, navigation, and control (GNC), summarizing the research advances in control theory and methods and engineering practice from Beijing Institute of Control Engineering over the years. The control schemes and systems based on these achievements have been successfully applied to remote sensing satellites, communication satellites, navigation satellites, new technology test satellites, Shenzhou manned spacecraft, Tianzhou freight spacecraft, Tiangong 1/2 space laboratories, Chang'e lunar explorers, and many other missions. Further, the research serves as a guide for follow-up engineering developments in manned lunar engineering, deep space exploration, and on-orbit service missions.
Author: John Hrastar
Author: John Hrastar
Author: 
Author: 
Author: United States. Superintendent of Documents
Author: United States. Superintendent of Documents
Author: 
Author: P. Th. L. M. Van Woerkom
Author: 
Author: Yongchun Xie
Author: United States. National Aeronautics and Space Administration